32
P. I. Ravikovitch
ZIF-4
ZIF-7
Fig. 4 Calculated free energy difference (blue lines), configurational internal energy difference
(green), and entropic contributions T (red lines) between the large pore (lp) and the narrow
pore (np) structures for ZIF-7 (top), and ZIF-4 (bottom). For ZIF-7, the experimental enthalpy
difference is ~6 kJ/(mol Zn), and the experimental transition temperatures are ~700 K [23]. For ZIF4, the experimental enthalpy difference is ~8.5 kJ/mol, and the experimental transition temperature
is ~150 K [24]
P. I. Ravikovitch
ZIF-4
ZIF-7
Fig. 4 Calculated free energy difference (blue lines), configurational internal energy difference
(green), and entropic contributions T (red lines) between the large pore (lp) and the narrow
pore (np) structures for ZIF-7 (top), and ZIF-4 (bottom). For ZIF-7, the experimental enthalpy
difference is ~6 kJ/(mol Zn), and the experimental transition temperatures are ~700 K [23]. For ZIF4, the experimental enthalpy difference is ~8.5 kJ/mol, and the experimental transition temperature
is ~150 K [24]